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(No Model.)

Patented Oct. 25, 1892.

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UNITE STATES PATENT OFFICE.

BENJAMIN E. SMITH, OF SOMERVILLE, MASSACHUSETTS, ASSIGNOR OF ONE- HALFTO CHARLES G. SMITH, OF SAME PLACE.

SAND-TRAP FOR ARTESIAN WELLS.

SPECIFICATION forming part of Letters Patent No. 485,064, dated October25, 1892.

Application filed February 5, 1892. Serial No. 420,423- (Nomodel-l Toall whom it may concern.-

Be it known that I, BENJAMIN F. SMITH, a citizen of the United States,and a resident of Somerville, in the county of Middlesex and State ofMassachusetts, have invented new and useful Improvements in Sand-Trapsfor Artesian Wells,of which the following, taken in connection with theaccompanying drawings, is a specification.

This invention relates to improvements in sand-traps for Artesian ordriven wells, and it is carried out as follows, reference being had tothe accompanying drawings, wherein Figure 1 represents a verticalsection of the invention, showing the vacuum and suction pumps inelevation; and Fig. 2 represents a cross-section on the line X X, shownin Fig. 1.

Similar letters refer to similar parts wherever they occur on thedifferent parts of the drawings.

The sand-trap consists of an inc-losing shell orchamber, preferablycomposed of a middle cylindrical shell A and closed top and bottom B O,which are secured air-tight to the re spective ends of the middle shellA, as shown in Fig. 1. From the shell A lead a number of pipes 01 to theArtesian or driven wells from which the water is pumped, each such pipeat being provided with a valve or cut-off D, which may be opened,closed,0r regulated by means of a suitable hand-wheel D, as shown in thedrawings. Above the supply-pipes d d is located a pipe e,leading fromthe shell or chamber A to the pump E, by means of which the water isforced to the place where it is to be used. Between the pipe-openings dcl and e is located, within the shell or chamberA, a perforated wirescreen or netting F, which is supported in any suitable or practicalmanner within said shell A, and it serves for the purpose of arrestingsand, grit, and impurities that may pass from the wells through thepipes d 01 into the chamber A. In practice I leave an annular space fbetween the periphcry of the netting F and the interior wall of theshell or chamber A, so as to permit an unobstructed flow of Water frompipes 01 d to the pump E in case the meshes of said netting F shouldbecome clogged.

0 represents the sand or grittysubstances arrested in the lower part Oof the sand-trap. The upper part B serves as an air-chamber, and it isconnected by means of a pipe I) to a vacuum-pump B, by means of whichthe surplus accumulation of air may be pumped out from time to time, asmaybe desired.

G is a glass gage connected to the shells A B above and below thedesired normal level of the liquid in the said trap for the purpose ofascertaining from time to time the height of the liquid therein. By thisarrangement a single sand-trap may be connected to any desired number ofwells, and by shutting off or opening any one of the valves D the watermay be pumped from one or more of the wells, as may be required.

Having thus fully described the nature, construction, and operation ofmy invention, I wish to secure by Letters Patent and claim- In asand-trap for Artesian or driven wells, the combination of a closedshell A,having a series of radiating valved well-tubes d and pcontaining ascreen F, arranged to provide an annular water-passage fbetween the periphery of the screen and the internal surface of theshell, a pump E, having a pipe e connected with the shell at a pointabove the screen, and a vacuum-pump B, having a pipe I) connected withthe air-chamber in the top por tion of the shell, substantially asdescribed.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, on this 21st day of January, A.D. 1892.

BENJAMIN F. SMITH. \Vitnesses:

ALBAN ANDREN, ALICE A. PERKINS.

